Action Mailer setting for Yahoo! smtp.  #21

Signed-off-by: ataka <masayuki.ataka@gmail.com>
Print log, not email, when exception.  #21

Fix typo.  missed ","(comma) in config/environments/development.rb.

Signed-off-by: ataka <masayuki.ataka@gmail.com>
Send exception, if new page is open.  #21

Signed-off-by: ataka <masayuki.ataka@gmail.com>